Propeller



FIG. 1 is a left, front perspective view of a propeller according to my design;

FIG. 2 is a right, rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a right side view thereof.

The broken line depiction of the hub element has been shown for the purpose of illustrating a portion of the propeller which forms no part of the claimed design. 

The ornamental design for a propeller, as shown and described. 